Viết lại câu: I'll only help you if you promise to try harder

​1. I'll only help you if you promise to try harder.
=> Unless___________
2. ''You were treating '' said Carol to June 
=> Carol accused_______
3. She bought that house in 1973
=>She has_____
4.They believe he is armed
=> He_____
5.Our house is going to be painted by a local firm
=> We are_______